From the reference libraryFiveM

AUDIO Natives

natives/AUDIO/0xC64A06D939F826F5.md

GET_NEXT_AUDIBLE_BEAT

Property	Value
Native Name	`GET_NEXT_AUDIBLE_BEAT`
Hash	`0xC64A06D939F826F5`
Return Type	`BOOL`
Parameters	`timeInSeconds` (float), `bpm` (float), `beatNum` (int*)

timeInSeconds (float*) — time in seconds until the start of the next beat
bpm (float*) — current tempo in beats per minute,
beatNum (int*) — integer beat within the bar